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园艺学报 ›› 2003, Vol. 30 ›› Issue (02): 152-156.

• 研究论文 • 上一篇    下一篇

不同营养液浓度对莴苣生长特性的影响

范双喜
  

  1. (北京农学院园艺系,北京102206)
  • 收稿日期:2002-03-28 修回日期:2002-12-27 出版日期:2003-04-25 发布日期:2003-04-25

Efects of Nutrient Solution of Different Concentrations on Growth Properties ofLactuca saliva var. Longifolia Lam.

Fan Shuangxi
  

  1. ( Depatment of Horticulture,Beijing Agricultural College,Beijing 102206,China)
  • Received:2002-03-28 Revised:2002-12-27 Online:2003-04-25 Published:2003-04-25

摘要: 以长叶莴苣( Lactuca sativa var.1ongifolia Lam.)为试材,研究了NFT栽培条件下莴苣水分与养分吸收特性,以及NFT对其生长发育的影响。试验结果表明,莴苣蒸腾效率前期>中期>后期;整个生育过程中,P、K、Mg的吸收成分组成浓度(养分与水分吸收比,n/w)均低于原始营养液浓度,而Ca则相反;NO3--N因处理浓度不同而异。叶片中各无机成分含量随生育过程而提高,同一生育期随营养液浓度提高而增加;综合莴苣产量因子与商品性状,以3/4倍园试均衡液最佳。

关键词: NFT栽培, 莴苣, 养分吸收, 生育特性

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